Patent GB-101859-A (GB)
Title: Improvements in Typewriting Machines.
IPC: B41J3/37
Filed: 1916-01-19
Abstract: 101,859. Corona Typewriter Co., (Assignees of Mosher, C. P.). Oct. 16, 1915, [Convention date]. Folding type-lever machines.-The keyboard can be folded towards the platen, and the frame of the machine may be arranged to constitute a case when the machine is folded. As shown, the keyboard and the entire action are mounted in a support 29 consisting of plates 31 connected by a cross-bar 32 and pivoted on a rock-shaft 30 carried by the sides of the main frame 11. The typelevers 38 are pivoted in a segment 34 supported by guides 33 on the plates 29, and the actionlevers, described below, are pivoted on rods connecting the plates. In folding the machine, the support 29 is turned upwards about the pivot 30, a hinged base 21 is turned upwards against the cress-bar 32, and a hinged lid 12 is turned over to engage the edge of the base. The frame may be made of aluminium and be faced with leather. The base is provided with locking-stays 23 engaging pins 27 on the frame 11, and the support 29 is connected to the base by links 61. The typelevers 38 are connected by links 44 to bell-cranks 47 formed with cams 55 engaging cams 56 on the arms 57 of the key-levers 58, the cams imparting an accelerated stroke to the type-levers. The bell-cranks and the key-levers are pivoted on rods 48, 59 respectively. The links 44 prevent the type - levers from rebounding. Keys.-The keys 60 are arranged in four banks, and, to ensure a uniform touch, the arms of the key-levers are made of uniform lengths, the keylevers of each bank being pivoted on one of the four rods 59 arranged at uniform horizontal distances from the associated banks of keys. Case-shift mechanism; shiftkey< >actions. - Shift-key levers 109 pivoted on the plates 31 engage levers 114 abutting on lugs 116 on the segment 34, the shift - movements being limited by the engagement of the lugs 116 with stops 117,118 on the guides 33. Counterbalancing - springs 120 are connected to the lugs 116, and rollers 129a, are arranged between the guides and the segment. Shift-key locks.-The shift-kev lever 109, Fig. 1, carries a lock consisting of a bell-crank 121 which is connected to a spring and is provided with a key 122 and a notch 126, which engages a stop when the shift-key 112 is depressed. Letter-spacing mechanism; ink-ribbon mechanism.-(1) A universal bar 73 for operating these mechanisms is pivoted by arms 74 on the segment 34 and is operated by cams 76 on the heels of the type-levers 38, the cams being arranged to give an accelerated movement to the universal bar. (2) The connexions between the universal bar and the letter-spacing and ink-ribbon mechanisms are arranged to permit the support 29 to be folded. As shown, the universal bar engages arms 77 on a rock-shaft 78 mounted in the plates 31 and provided with forked arms 79 engaging pins 80 on arms 81 secured to the rock-shaft 30. A collar 82 secured to the shaft 30 is formed on the end with V- shaped projections 84 or cams engaging a sliding collar 83, which is slotted to engage the end of a bell-crank 88 pivoted on the main frame 11. At each operation, the collar 88 is moved in one direction by the collar 82 and in the other by a spring 85, and the bell-crank is rocked. (3) The arm 89 of the bell-crank is forked to engage a pin 91 on a rock-shaft 92, which is journaled in the main frame and carries fast and loose dogs 94, 93 adapted to engage an escapement-wheel 95 geared to the carriage 65. (4) The ink-ribbon vibrator 133 is connected by a link 132 to an arm 131 on the rock-shaft 92. (5) The ink ribbon is fed between spools 144<a>, 144 provided with ratchetwheels 145 operated by pawls 146 pivoted to arms 147 on the rock-shaft 92. The arms 147 are connected by a bar 149 and can be moved along the rock-shaft to reverse the feed, the bar being formed with projections 150 adapted to engage notches in the rock-shaft. Space-key actions.-The space-bar 103, Fig. 1, is mounted on levers 106 pivoted on one of the rods 59 and formed with arms which engage the pins 80. The space-bar is secured to brackets 104 which can fold about pivots 105 and normally bear on stops 107.